Crampons of Climbing (3.5e Equipment)
From D&D Wiki
This item resembles a piece of add-on footwear rigid with jagged spikes. Crampons can be attached to any boots already worn in order for the wearer to benefit from their effect. When using this item, it bestows the user a competence bonus to Climb checks equal to the crampons' enhancement bonus.
Cost to Create: 800 gp (+2), 3,200 gp (+4), 7,200 gp (+6), 12,800 gp (+8), 20,000 gp (+10).